叠前时空域线性干扰的衰减及应用

Elimination of linear interference in time-space domain and its application

1. 成都理工大学,四川成都 610059; 2. 中国石化西南分公司第二物探大队,四川德阳 618000

Chengdu University of Technology, Chengdu 610059, China

针对叠前地震数据中的线性干扰噪声,首先分析和识别出各组线性干扰波的频带范围及视速度范围,并通过分频处理从地震记录中自动分离出线性干扰所在频带范围的信号分量,然后采用线性干扰视速度扫描和空间域噪音剔除法迭代求解线性相干噪声,从原始记录中将其剔除或减掉,线性干扰频带范围之外的地震信号不会有任何改变。合成数据和实际地震数据处理结果表明,该方法适合于叠前2D/3D地震记录中各种线性相干噪声的处理,对地震信号具有良好的振幅保真性。

This paper introduces a method applicable for elimination of linear interference waves in prestack seismic data. Firstly, the frequency bands and apparent velocities of linear interference waves are identified. Then in different frequency range, the linear interference waves are singled out by apparent velocity scanning and time-domain noise elimination, and are removed from seismic data. The feasibility of the method is tested on synthetic and real data. The tests show that the amplitudes of the resulted seismic data are preserved well.